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[SYCL][CMake] Apply SYCL_LIBDEVICE_CXX_FLAGS to IMF host compile #19611

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Jul 28, 2025
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14 changes: 8 additions & 6 deletions libdevice/cmake/modules/SYCLLibdevice.cmake
Original file line number Diff line number Diff line change
Expand Up @@ -56,13 +56,18 @@ set(compile_opts
set(SYCL_LIBDEVICE_GCC_TOOLCHAIN "" CACHE PATH "Path to GCC installation")

set(SYCL_LIBDEVICE_CXX_FLAGS "" CACHE STRING "C++ compiler flags for SYCL libdevice")
if(NOT SYCL_LIBDEVICE_CXX_FLAGS STREQUAL "")
separate_arguments(SYCL_LIBDEVICE_CXX_FLAGS NATIVE_COMMAND ${SYCL_LIBDEVICE_CXX_FLAGS})
endif()

if (NOT SYCL_LIBDEVICE_GCC_TOOLCHAIN STREQUAL "")
list(APPEND compile_opts "--gcc-install-dir=${SYCL_LIBDEVICE_GCC_TOOLCHAIN}")
list(APPEND SYCL_LIBDEVICE_CXX_FLAGS "--gcc-install-dir=${SYCL_LIBDEVICE_GCC_TOOLCHAIN}")
endif()

if(NOT SYCL_LIBDEVICE_CXX_FLAGS STREQUAL "")
separate_arguments(SYCL_LIBDEVICE_CXX_FLAGS NATIVE_COMMAND ${SYCL_LIBDEVICE_CXX_FLAGS})
list(APPEND compile_opts ${SYCL_LIBDEVICE_CXX_FLAGS})
endif()

if(LLVM_LIBCXX_USED)
list(APPEND compile_opts "-stdlib=libc++")
endif()
Expand Down Expand Up @@ -646,12 +651,9 @@ set(imf_bf16_fallback_src ${imf_fallback_src_dir}/imf_bf16_fallback.cpp)
set(imf_host_cxx_flags -c
--target=${LLVM_HOST_TRIPLE}
-D__LIBDEVICE_HOST_IMPL__
${SYCL_LIBDEVICE_CXX_FLAGS}
)

if (NOT SYCL_LIBDEVICE_GCC_TOOLCHAIN STREQUAL "")
list(APPEND imf_host_cxx_flags "--gcc-install-dir=${SYCL_LIBDEVICE_GCC_TOOLCHAIN}")
endif()

if(LLVM_LIBCXX_USED)
list(APPEND imf_host_cxx_flags "-stdlib=libc++")
endif()
Expand Down